Rimuru is building a dungeon in preparation for the upcoming festival. It will feature treasure chests containing weapons made by Kurobe, and Veldora will inhabit the deepest floor as the final boss. Then Milim suddenly shows up with a suggestion...
I want to rig all kinds 
of gimmicks in it, too.
أريد تفخيخها بمختلف الحِيَل والخدع أيضاً
Ich habe so einige Pläne.
Prepararé trucos y trampas
Prepararé trucos y trampas
Voglio metterci diversi meccanismi
E quero colocar vários mecanismos.
Мне там много чего попробовать хочется…